PDB Statistics: PDB Data Distribution by Molecular Weight (Structure)

All macromolecules, small molecules, and ions are included, except for water molecules. Molecular weight is calculated for all atoms, including those not observed in the experiment. Molecular weight of all non-water atoms in the asymmetric unit.

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Molecular Weight (Daltons)Number of Entries
< 20K33,188
20K - 40K48,088
40K - 60K35,262
60K - 80K22,204
80K - 100K15,285
100K - 120K11,037
120K - 140K7,432
140K - 160K6,141
160K - 180K4,964
180K - 200K3,587
200K - 220K2,989
220K - 240K2,402
240K - 260K1,858
260K - 280K1,602
280K - 300K1,287
300K - 320K1,022
320K - 340K975
340K - 360K948
360K - 380K799
>= 380K12,151